Samsung Electronics Co., Ltd.

Samsung Electro-mechanics Co., Ltd.

Snur & Db Foundation

Jae-woo Chung

Young-ki Hong

Sung-gyu Kang

Seung-mo Lim

Hwa-sun Lee

Joong-hyuk Kim

Jae-Chang Lee

Tae-kyung Lee

Seung-ho Lee

Kyo-yeol Lee

Chang-youl Moon

Tae-Woon Cha

Yong-wan Jin

You-seop Lee

Se-young Oh

Sang-kwon Wee

Chang-seung Lee

Jun Heyung Jung

Jong-beom Kim

Jae-chang Lee

Kyo-yool Lee

Ji-Hoon Kim

Jong-min Kim

Mi-jeong Song

Joonghyuk Kim

Seung-Ho Lee

Su-ho Shin

Seong-taek Lim

Kwang-ho Lee

Young-Ki Hong

Jung-min Oh

Chang-hoon Jung

Seung-Yeop Kwak

Tae-gyun Kim

Kae-dong Back

Hyo-Sang Jung

Sang-chae Kim

Tae-woon Cha

Kyung-hee You

Jong-Hwan Weon

Seung-Hyun Baik

Kyung-Bo Sim

Dae-woo Suh

Ru-jun Ma

Sang-Jae Jung

Young-seok Oh

Kyu-yeol Lee

Tao-kyung Lee

Tae-kyun Lee

Myung-Kill Kim

Tae-Ha Jeon

An electrically conductive carbon nanotube-metal composite ink may include a carbon nanotube-metal composite in which metal nanoparticles are bound to a surface of a carbon nanotube by chemical self-assembly. The electrically conductive carbon nanotube-metal composite ink may have higher electrical conductivity than a commonly used metal nanoparticles-based conductive ink, and may also be used in deformable electronic devices that are flexible and stretchable, as well as commonly used electronic devices, due to the bending and stretching properties of the carbon nanotube itself.

Conductive carbon nanotube-metal composite ink

A method of driving a hybrid inkjet printing apparatus includes applying an electrostatic voltage to ink contained in a nozzle, applying a waveform voltage to ink contained in the nozzle, the waveform voltage being applied by a piezoelectric driving device, and applying an ejection voltage so as to eject the ink.

Methods of driving hybrid inkjet printing apparatus including resonating ink in a nozzle

Thin film transistors (TFT) and methods of manufacturing the same. A TFT includes a line-shaped gate of uniform thickness. A cross-section of the gate is curved where a side surface and a top surface meet. The gate includes one, or two or more gate lines.

Electronic systems, thin film transistors, methods of manufacturing thin film transistors and thin film transistor arrays

A printing apparatus includes: a flow channel plate including, a pressure chamber, a nozzle including an outlet through which ink contained in the pressure chamber is ejected, and a trench disposed around the nozzle, and the outlet extending into the trench; a piezoelectric actuator configured to provide a change in pressure to eject the ink contained in the pressure chamber; and an electrostatic actuator configured to provide an electrostatic driving force to the ink contained in the nozzle.

Printing system, printing apparatuses, and methods of forming nozzles of printing apparatuses

A method of forming a wiring may include forming a first wire on a substrate; forming a material layer on the substrate, except on the first wire; forming a surface treatment film on the material layer; and forming a second wire on the first wire. The surface treatment film has physical properties opposite to the first wire. A method of forming a wiring may include forming a first wire on a substrate; forming a material layer on the substrate and the first wire; removing a portion of the material layer from the first wire; forming a surface treatment film on the material layer and the first wire; removing a portion of the surface treatment film from the first wire; and forming a second wire on the first wire. A thickness of the material layer on the substrate is greater than a thickness of the first wire on the substrate.

Methods of forming wirings in electronic devices

An inkjet printing device includes a flow path plate comprising a manifold to supply ink, a pressure chamber filled with the ink supplied from the manifold, and a nozzle via which the ink is ejected, a piezoelectric actuator which is disposed on a top surface of the flow path plate and includes a lower electrode, a piezoelectric layer, and an upper electrode that are stacked sequentially, a first electrostatic electrode to generate an electrostatic field, and a second electrostatic electrode which is disposed a predetermined distance apart from a bottom surface of the flow path plate to generate the electrostatic field between the first electrostatic electrode and the second electrostatic electrode.

Inkjet printing device and method of driving the same

A method of forming patterns on a substrate, the method including: placing a mask having an opening defining a portion of one surface of a substrate on which patterns are to be formed on the substrate; forming a first modification layer in the opening by ejecting a surface modification ink onto a surface of the substrate through the opening; ejecting a target ink having droplets of sizes larger than those of a surface modification ink such that the target ink is distributed on the first modification layer in the opening; and removing the mask.

Methods of forming patterns on a substrate

A printing apparatus includes a first nozzle substrate having a first tapered nozzle unit aligned with a pressure chamber and a second nozzle substrate having a second tapered nozzle unit aligned with the first tapered nozzle unit and attached to the bottom of the first nozzle substrate.

Inkjet printing apparatus and method of forming nozzles

A method of manufacturing a piezoelectric inkjet printhead includes processing a lower silicon-on-insulator substrate having a sequentially stacked structure with a first silicon layer, an intervening oxide layer, and a second silicon layer, processing the lower silicon-on-insulator substrate by etching the second silicon layer to form a manifold, a plurality of pressure chambers arranged along at least one side of the manifold and connected with the manifold, and a plurality of dampers connected with the pressure chambers, and by etching the first silicon layer and the intervening oxide layer to form a plurality of vertical nozzles through the first silicon layer and the intervening oxide layer to corresponding ones of the plurality of dampers, stacking and bonding an upper substrate on the lower substrate, reducing the upper substrate to a predetermined thickness, and forming a piezoelectric actuator on the upper substrate.

Piezoelectric inkjet printhead and method of manufacturing the same

A method of forming a piezoelectric actuator on a vibration plate to provide a driving force to each of a plurality of pressure chambers includes forming a lower electrode on the vibration plate, forming a piezoelectric layer on the lower electrode at a position corresponding to each of the pressure chambers, forming a supporting pad on the lower electrode, the supporting pad contacting one end of the piezoelectric layer and extending away from the one end of the piezoelectric layer, forming an upper electrode extending from a top surface of the piezoelectric layer to a top surface of the supporting pad, and bonding the upper electrode to a driving circuit above the supporting pad to receive a voltage from the driving circuit.

Method of forming a piezoelectric actuator of an inkjet head

A method of driving a hybrid type inkjet printing apparatus according to example embodiments may use both a piezoelectric method and an electrostatic method. The method of driving may include a plurality of driving modes that are determined by adjusting the order, amplitude, and duration of a piezoelectric driving voltage to a piezoelectric actuator and an electrostatic driving voltage to an electrostatic force applying unit. As a result, ink droplets may be ejected in various sizes and shapes. In a first driving mode, a dome-shaped ink meniscus may be formed at an end portion of a nozzle and ink droplets having a smaller size than the nozzle may be ejected from a surface of the dome-shaped ink meniscus. In a second driving mode, a cone-shaped ink meniscus may be formed at an end of the nozzle, and ink droplets having a smaller size than those of the first driving mode may be ejected from a sharp end portion of the cone-shaped ink meniscus. In a third driving mode, a syringe/cone-shaped ink meniscus may be formed at an end portion of the nozzle and ink in the form of an ink stream may be ejected from a sharp end portion of the syringe/cone-shaped ink meniscus.

Methods of driving an inkjet printing apparatus

An inkjet printing device includes: a flow path plate, a piezoelectric actuator and an electrostatic force applicator. The flow path plate includes an ink inlet, a pressure chamber and a nozzle. The piezoelectric actuator is configured to provide a first driving force, and the electrostatic force applicator is configured to provide a second driving force. The disclosed inkjet printing devices and methods combine piezoelectric and electrostatic techniques.

Inkjet printing devices and methods of driving the same

Provided is a nozzle plate and methods of manufacturing the nozzle plate. The nozzle plate may include a substrate having a nozzle. The nozzle plate may also include a permittivity reducing area in an upper portion of the substrate around the nozzle, wherein the permittivity reducing area includes a plurality of porosities and a plurality of walls between the plurality of porosities. Additionally, the nozzle plate may include a protection layer on the substrate, wherein the protection layer covers the plurality of porosities and the plurality of walls.

Nozzle plate and method of manufacturing the same

A method of manufacturing a thin film transistor includes sequentially forming a gate and at least one insulation layer on a substrate, forming a source electrode and a drain electrode on the at least one insulation layer, and forming a channel layer formed of a semiconductor on a part of the source electrode and the drain electrode, wherein the gate, the source electrode, and the drain electrode are formed by using a hybrid inkjet printing apparatus.

Method of manufacturing TFT and array TFT

Growing community of inventors

Yongin-si, South Korea

Jae-woo Chung